| 摘要 |
PURPOSE:To shorten the delay time from the switching of an input t variation in output voltage by driving transistors (TR) of an output stage with a TTL output voltage through a capacitor. CONSTITUTION:When the output of an ECL circuit is supplied from input terminals 11 and 12, a TTL output is obtained from the collectors of TRs4 and 5 constituting a differential amplifier. This TTL output turns on and off TRs1 and 2. The base of the TR1 and the collector of the TR4 are coupled together through the capacitor 22. Consequently, capacities between the collector and base, and base and emitter of the TR1 are charged or discharged abruptly in a transient state wherein an output voltage rises or falls. Therefore, the delay time from the switching of the input voltage to the variation in output voltage is shortened. |
